MT's site say 11.1 for section width...and in brackets it says 8. You're running a 9 inch...which I would think would increase your section width...which means you'll be closer to the frame and wheel lips.
This is the info I was hoping for.
I had assumed different wheels and my numbers were based off the wrong backspacing.
I’ll run the numbers and make a sketch when I get home tonight.
My initial thoughts are you will have more clearance at the frame and less clearance at the fender lip than your current setup. It should still be the same as hensleyt, only with a wider wheel.
Based off these numbers it should look something like this.
It would probably be a good idea to allow a 1/4” variation for sidewall bulge.
To measure for the fender lip you could jack the rear of the car up evenly, run a straight edge vertically on the outside of the tire and measure to the lip.
This should be a good visualization.